Problem with replace word

[nananya]

I am using replace word function,try to replace "\" to "/".
this is my code:

import java.lang.*;
public class test {

    public static void main(String[] args) {
        String str="We want \\ replace word from \\ this string";

        str=str.replaceAll("\\", "/");

        System.out.println(str);
    }
}

And it give me this error...

Exception in thread "main" java.util.regex.PatternSyntaxException: Unexpected in
ternal error near index 1
\
^
at java.util.regex.Pattern.error(Unknown Source)
at java.util.regex.Pattern.compile(Unknown Source)
at java.util.regex.Pattern.<init>(Unknown Source)
at java.util.regex.Pattern.compile(Unknown Source)
at java.lang.String.replaceAll(Unknown Source)
at test.main(test.java:7)

I wonder why?
Can anyone help me?

[2by4]

Your first argument is a regular expression.

Look at what needs to be passed in for a backslash..

Summary of regular-expression constructs
Construct 	Matches
 
Characters
x 	The character x
\\ 	The backslash character
\0n 	The character with octal value 0n (0 <= n <= 7)
\0nn 	The character with octal value 0nn (0 <= n <= 7)
\0mnn 	The character with octal value 0mnn (0 <= m <= 3, 0 <= n <= 7)
...

source: Pattern (Java 2 Platform SE v1.4.2)

Then figure out how to write that as a string literal.

Hint: double escaping required.

[Fubarable]

Or how about simply using replace(...) rather than replaceAll(...) since the former doesn't use regex, and regex isn't really needed here for this simple replace?

[nananya]

Thank you both,after i trying using replace(),it works.
Thank you very much!